The singer also admitted in the interview that she would breakdown in tears over the troubles she was having in her personal life between the concerts.

‘There were times when what was going on in my personal life was so overwhelming that I had to bend over to let those tears fall straight out of my eyes and not my false lashes just as I’m about to go up on that ramp and sing Teenage Dream.’

By submitting your details, you will also receive emails from Time Inc. UK, publisher of Marie Claire and other iconic brands about its goods and services, and those of its carefully selected third parties. Please tick here if you’d prefer not to hear about:

Time Inc.'s goods & services, including all the latest news, great deals and offers